﻿using System;
using System.CodeDom;
using System.CodeDom.Compiler;
using System.Reflection;
using System.Security.Permissions;
using System.Web.Services.Description;
using System.Xml;

public class WSProxy_ForBanking
{
    [SecurityPermissionAttribute(SecurityAction.Demand, Unrestricted = true)]
    public static object CallWebService(string webServiceAsmxUrl, string serviceName, string methodName, object[] args)
    {
        //System.Net.WebClient client = new System.Net.WebClient();

        //// Connect To the web service
        //System.IO.Stream stream = client.OpenRead(webServiceAsmxUrl + "?wsdl");

        //// Now read the WSDL file describing a service.
        //ServiceDescription description = ServiceDescription.Read(stream);

        XmlTextReader xmlreader = new XmlTextReader(webServiceAsmxUrl + "?wsdl");
        ServiceDescription description = ServiceDescription.Read(xmlreader);

        ///// LOAD THE DOM /////////

        // Initialize a service description importer.
        ServiceDescriptionImporter importer = new ServiceDescriptionImporter();
        importer.ProtocolName = "Soap12"; // Use SOAP 1.2.
        importer.AddServiceDescription(description, null, null);

        // Generate a proxy client.                      
        importer.Style = ServiceDescriptionImportStyle.Client;

        // Generate properties to represent primitive values.
        importer.CodeGenerationOptions = System.Xml.Serialization.CodeGenerationOptions.GenerateProperties;

        // Initialize a Code-DOM tree into which we will import the service.
        CodeNamespace nmspace = new CodeNamespace();
        CodeCompileUnit unit1 = new CodeCompileUnit();
        unit1.Namespaces.Add(nmspace);

        // Import the service into the Code-DOM tree. This creates proxy code that uses the service.
        ServiceDescriptionImportWarnings warning = importer.Import(nmspace, unit1);

        if (warning == 0) // If zero then we are good to go
        {
            // Generate the proxy code
            CodeDomProvider provider1 = CodeDomProvider.CreateProvider("CSharp");

            // Compile the assembly proxy with the appropriate references
            string[] assemblyReferences = new string[5] { "System.dll", "System.Web.Services.dll", "System.Web.dll", "System.Xml.dll", "System.Data.dll" };
            CompilerParameters parms = new CompilerParameters(assemblyReferences);
            parms.GenerateInMemory = true;
            CompilerResults results = provider1.CompileAssemblyFromDom(parms, unit1);

            // Check For Errors
            if (results.Errors.Count > 0)
            {
                foreach (CompilerError oops in results.Errors)
                {
                    System.Diagnostics.Debug.WriteLine("========Compiler error============");
                    System.Diagnostics.Debug.WriteLine(oops.ErrorText);
                }

                throw new Exception("Compile Error Occured calling webservice. Check Debug ouput window.");
            }

            // Finally, Invoke the web service method
            object wsvcClass = results.CompiledAssembly.CreateInstance(serviceName);
            MethodInfo mi = wsvcClass.GetType().GetMethod(methodName);
            return mi.Invoke(wsvcClass, args);
        }

        return null;
    }
    
}

